Spark plug



Patented ug.. 26, 1924.

UNITED STATES PATENT ottici-3.

Am BO'UBCHEIX, 0F BROOKLYN, NEW YORK, ASSIGNOR 0F ONE-HALF TO SIDNEY E.HANN, OF SHEEPSHEAD BAY, vNEW YORK.

SPARK PLUG.

Application filed September 30, 1921. Serial No. 504,385.

To all whom t may concern.'

Be it known that l, AIM BOURGHEIX, a citizen of France, and resident ofManhattan Beach, borough of Brooklyn, county of Kings, and State of NewYork, have i nvented a new and improved Spark Plug, of which thefollowing is a full, clear, and exact description.

My invention relates to a spark plug and aims to provide new and usefulimprovements in connection with a device of this character.

In connection with intern'al combustion engines it is a well'appreciated fact that it is quite customary, that due to wear and othercauses, a certain amount of lubricant within the crank case enters intothe combustion chambers. incident to this action, as well as to animproper fuel mixture, the 2o spark plugs within the combustion chambersreadily become fouled or sooted, so that they refuse to produce aneffective spark, and it is thus necessary to frequently remove the plugsand cleanse the same, and even this an in many instances, due to theexcessive carbonization within the combustion chamber, fails to producesatisfactory results.

With this in mind my present invention aims to provide a spark plug ofextremely 3o simple construction which shall be so constructed as tovirtually preclude any danger of a fouling or sooting of these partsregardless of the improper mixture or amount of lubricant within thecombustion chamber.

A further object of this invention is the construction of a device ofthe nature stated which shall embody the above functions without howeverin the slightest interfering with the normal efficient expansion withint0 the combustion chamber.

Still further objects of this invention will appearin the annexedspecification taken in connection with the drawings which latterillustrate practical embodiments of the same,

and in which;

Figure 1 is a side elevation of a plug embodying my improvedconstruction and showing the same in position.

Figure 2 is a sectional side view thereof taken along the line 2-2thereof and in the direction of the arrow indicated in Figure 1.

Figure 3 is a bottom` plan View of the device as illustrated in Figurel, and

Figure 4 is a sectional end View taken along the line 4 4 and in thedirection of the arrowindicated in Figure 2.

Also as in conventional construction, my improved plug includes a jacket7, and a clamping nut 8, the latter serving to retain the insulatingcore 9 in applied position with respect to the jacket, and a centralelectrode 10 is carried yby the insulating core 9 and extends beyond thesame within the jacket.

However, contrary to the conventional construction, it will be notedthat the jacket 7 is provided with a collar 7 and it is from thisportion of the block that the second electrode 11 preferably extends.Also for l a purpose hereinafter specifiedv it will be noted that aplurality of rods 12 have one of their ends secured to the collar 7',their opposite vor outermost ends mounting a plate 13 constituting abaffle, which plate may be aflixed to the rods 12 by any suitable meanssuch as nuts 14.

It\will further bel seen that the diameter of the plate 13 as in Figureis slightly less than the diameter of theA opening 6, so that the edgeof the plate 13 is spaced at all points from the inner face of theopening 6.

Thus it will be found in operation that while the fuel mixture is freeto reach the firing parts of the plug to produce an efficient explosion,that particles of oil and improperly atomized fuel will be deflected bythe plate 13 in such a manner that vir tually none of the same willenter the space existing between this plate and the central electrode.ln some isolated instances where a few of these particles would passthis space however, the same would rebound from the inner face of theopening 6 and be deflected by the collar 7 lt will also be noted thatincident to the funnel shaped construction 15 of the lower end of theinsulating core 9, that this element will, in addition to serving as adeiiector for particles of oil and fuel cooperate with the plate 13 inthe following manner; assuming that the spark was relatively weak andthat the plug is fired at the end of the compression stroke, the sparkof the usual plug would be deected or blown upwardly to a positionextremely accessible to the fuel mixture. However, due to the peculiarconstruction of my plug, the plate. 13 will initially serve to break theforce of currents produced, incident to this compressive action and alsothe funnelshaped construction -15 will act as a trap to prevent thedeflection of the spark'up- Wardly.

Thus all of the objects set forth in the preamble of this specificationhave been accomplished and it will further be understood that numerousmodifications o structure might readily be resorted to Without in theleast departing from the spirit of my invention, which l claim as;

ln combination with a motor block having Lacasse a spark plug opening, aspark plug adapted to be positioned within said opening, said spark plugcomprising a shell and having electrodes of a length which when thespark plug is positioned 1n the spark plug opening of the motor block,will occupy ay position within the confines of said spark plug opening,a pair of diametrically opposed legs dependent from the spark plugshell, a plate provided with diametrically opposed openings adapted toreceive said legs, and a plurality of nuts carried by each of said legsand adapted to grip the plate therebetween, said nuts being adjustableon the legs whereby the plate may be adjusted i with respect to theelectrodes of the spark plu g MM BOURCHEIX

